US9304716B2 - Printing device, control system, and control method of a control system - Google Patents

Printing device, control system, and control method of a control system Download PDF

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Publication number
US9304716B2
US9304716B2 US13/935,698 US201313935698A US9304716B2 US 9304716 B2 US9304716 B2 US 9304716B2 US 201313935698 A US201313935698 A US 201313935698A US 9304716 B2 US9304716 B2 US 9304716B2
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print data
data
encrypted
encrypted print
received
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US20140036304A1 (en
Inventor
Kazuhiro Takasu
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Seiko Epson Corp
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Seiko Epson Corp
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Priority to US15/054,276 priority Critical patent/US9513858B2/en
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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/12—Digital output to print unit, e.g. line printer, chain printer
    • G06F3/1201—Dedicated interfaces to print systems
    • G06F3/1223—Dedicated interfaces to print systems specifically adapted to use a particular technique
    • G06F3/1237—Print job management
    • G06F3/1238—Secure printing, e.g. user identification, user rights for device usage, unallowed content, blanking portions or fields of a page, releasing held jobs
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/12—Digital output to print unit, e.g. line printer, chain printer
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/12—Digital output to print unit, e.g. line printer, chain printer
    • G06F3/1201—Dedicated interfaces to print systems
    • G06F3/1202—Dedicated interfaces to print systems specifically adapted to achieve a particular effect
    • G06F3/1203—Improving or facilitating administration, e.g. print management
    • G06F3/1206—Improving or facilitating administration, e.g. print management resulting in increased flexibility in input data format or job format or job type
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/12—Digital output to print unit, e.g. line printer, chain printer
    • G06F3/1201—Dedicated interfaces to print systems
    • G06F3/1202—Dedicated interfaces to print systems specifically adapted to achieve a particular effect
    • G06F3/1222—Increasing security of the print job
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/12—Digital output to print unit, e.g. line printer, chain printer
    • G06F3/1201—Dedicated interfaces to print systems
    • G06F3/1223—Dedicated interfaces to print systems specifically adapted to use a particular technique
    • G06F3/1237—Print job management
    • G06F3/1244—Job translation or job parsing, e.g. page banding
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/12—Digital output to print unit, e.g. line printer, chain printer
    • G06F3/1201—Dedicated interfaces to print systems
    • G06F3/1278—Dedicated interfaces to print systems specifically adapted to adopt a particular infrastructure
    • G06F3/1285—Remote printer device, e.g. being remote from client or server
    • G06F3/1288—Remote printer device, e.g. being remote from client or server in client-server-printer device configuration
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/12—Digital output to print unit, e.g. line printer, chain printer
    • G06F3/1201—Dedicated interfaces to print systems
    • G06F3/1278—Dedicated interfaces to print systems specifically adapted to adopt a particular infrastructure
    • G06F3/1292—Mobile client, e.g. wireless printing
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/12—Digital output to print unit, e.g. line printer, chain printer
    • G06F3/1293—Printer information exchange with computer
    • G06F3/1294—Status or feedback related to information exchange
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/12—Digital output to print unit, e.g. line printer, chain printer
    • G06F3/1297—Printer code translation, conversion, emulation, compression; Configuration of printer parameters

Definitions

  • the present disclosure relates to a printing device that prints, a control system including the printing device and a control device connected to the printing device, and a control method of the control system.
  • a control system that has a printing device (POS device) and a control device (POS controller) connected to the printing device, and executes processes including recording images through the cooperation of the printing device and control device, is known from the literature. See, for example, Japanese Unexamined Patent Appl. Pub. JP-A-H05-73769.
  • JP-A-H05-73769 anticipates a dedicated application for controlling the printing device not being installed on the control device, and the control device controlling the printing device by using a browser function to appropriately access a specific server.
  • the efficiency of this printing process can be improved in this control system and the value of the system can be improved if the printing device can execute a process appropriate to the type of print data using a simple means.
  • a printing device includes a communication unit that has a first channel that executes a data process and a second channel different from the first channel, and communicates print data on the first channel or the second channel; and a print unit that prints based on the print data communicated on the first channel or the second channel of the communication unit.
  • the data process executed on the first channel is a decryption process that decrypts the encrypted print data; and the communication unit communicates the print data on the first channel when the received print data is encrypted and decrypts the encrypted data.
  • control system including: a control device having a browser execution unit that runs a web browser, and transmitting print data output by the browser execution unit on a first communication channel or a second communication channel; and a printing device having a communication unit that receives the print data transmitted by the control device on the first communication channel or second communication channel, and executes a process appropriate to the first communication channel or second communication channel, and a print unit that prints based on the print data received by the communication unit.
  • the control device encrypts the print data and transmits the encrypted print data on the first communication channel; and the printing device decrypts the print data transmitted on the first communication channel.
  • control device and the printing device store encryption information related to encrypting the print data; the control device encrypts the print data based on the stored encryption information and transmits the encrypted print data on the first communication channel; and the printing device decrypts the print data transmitted on the first communication channel based on the stored encryption information.
  • the print unit of the printing device converts the decrypted print data to a control command that controls the print unit, and prints based on the converted control command.
  • Another aspect of the disclosure is a control method of a control system, the control method including steps of: a control device transmitting print data to a printing device on a first communication channel that performs a data process on the print data or a second communication channel that performs a data process different from the data process performed on the first communication channel; and the printing device printing based on the print data transmitted on the first communication channel or the second communication channel.
  • Another aspect of the disclosure is a program that causes a printing device to receive print data over a first communication channel that processes the received print data or a second communication channel different from the first communication channel, and to print based on the print data received over the first communication channel or the second communication channel.
  • Another aspect of the disclosure is a method of controlling a control system having a printing device and a control device that can communicate with the printing device, wherein the control device transmits print data output by a browser execution unit that runs a web browser through a first communication channel or a second communication channel, and the printing device receives the print data sent by the control device through the first communication channel or second communication channel, processes the data as required according to the communication channel that was used, and prints based on the received print data.
  • FIG. 1 is a block diagram showing the configuration of a control system according to a first embodiment of the disclosure.
  • FIG. 2 is a block diagram showing the functional configuration of the control system.
  • FIG. 3 shows an example of a window displayed on a tablet device.
  • FIG. 4 is a flow chart of the operation of the control system.
  • FIG. 5 is a block diagram showing the function configuration of main parts of the control system.
  • FIG. 6 is a flow chart of the operation of the control system.
  • FIG. 7 is a block diagram showing main parts of a printer according to a second embodiment of the disclosure.
  • FIG. 1 is a block diagram showing the configuration of a control system 1 according to a preferred embodiment of the disclosure.
  • FIG. 2 is a block diagram showing the functional configuration of a tablet device 10 , printer 11 , and POS (point-of-sale) server 17 in the control system 1 .
  • POS point-of-sale
  • the control system 1 is an example of a POS system used in a retail store in a shopping center or department store, or in other types of businesses.
  • the main functions of the control system 1 are, for example, managing product sales, product inventory, and sales trends in the store, processing sale transactions at checkout counters L in the store according to the products purchased by a customer, and producing receipts based on the payment received from the customer.
  • the tablet device 10 control device
  • a printer 11 printing device
  • the tablet device 10 and printer 11 are connected so that they can communicate through a communication line 5 .
  • the communication line 5 in this embodiment is a wired or wireless communication channel conforming to the Ethernet (R) standard, but is not so limited if data can be communicated between devices connected to the communication line 5 .
  • the tablet device 10 is a tablet computer. As shown in FIG. 3 and described below, the tablet device 10 in this embodiment has a touch panel 10 a covering substantially the entire front surface.
  • the touch panel 10 a includes a touch sensor 10 c that detects touch operations layered over and formed in unison with a display panel 10 b as a display screen. Because the tablet device 10 operates by detecting user touches with the touch sensor 10 c , there is no need to connect an external keyboard or display panel to the tablet device 10 .
  • the printer 11 may be a thermal printer that prints on thermal roll paper, or a dot impact printer, for example.
  • the printer 11 produces a receipt based on data input from the tablet device 10 .
  • a barcode scanner 12 for reading barcodes on products or product packaging
  • a card reader 13 for reading credit cards or preferred customer cards
  • a cash drawer 14 for holding cash, checks, or other payment instruments
  • a customer display 15 for displaying transaction data for the customer.
  • the card reader 13 could be used to read magnetic information recorded on a magnetic stripe card, or to read and write information to an IC card.
  • the barcode scanner 12 connects to a printer 11 by short-range wireless communication conforming to the Bluetooth (R) standard.
  • the card reader 13 connects to the printer 11 by a wired communication standard such as USB.
  • the cash drawer 14 and customer display 15 connect to the printer 11 by wired communication standards, such as RS-232C and USB, respectively, in this embodiment.
  • the barcode scanner 12 , card reader 13 , cash drawer 14 , and customer display 15 respectively exchange data and signals with the printer 11 according to predetermined communication protocols.
  • the printer 11 includes a printer-side control unit 20 , print unit 21 , wireless device communication unit 22 , wired device communication unit 24 , and printer interface 23 .
  • the printer-side control unit 20 controls various parts of the printer 11 , and includes a CPU, RAM, ROM, and other peripheral circuits not shown.
  • Programs installed to the printer 11 include a program for controlling the print unit 21 , and a program for communicating with the tablet device 10 according to a specific protocol.
  • the printer-side control unit 20 includes a print unit control unit 20 a that controls the print unit, and a communication unit 20 b that executes the communication program and communicates with the tablet device 10 .
  • the print unit 21 prints an image on the roll paper and then cuts the roll paper, producing a receipt.
  • the print unit 21 includes a print mechanism including a control circuit that controls the printing operation, a conveyance mechanism that conveys the roll paper, and a recording head, and prints text and images on roll paper, and a paper cutter mechanism that cuts the roll paper.
  • the print unit control unit 20 a and the print unit 21 work together and function as a print unit.
  • the wireless device communication unit 22 communicates by Bluetooth short-range wireless communication with the barcode scanner 12 , and includes a link manager, link controller, high frequency circuit, and antenna.
  • the device communication control unit 20 c reads and runs a Bluetooth Driver Stack to control Bluetooth hardware.
  • the device communication control unit 20 c controls the wireless device communication unit 22 and communicates with the barcode scanner 12 by short-range wireless communication.
  • the wired device communication unit 24 communicates with at least the card reader 13 and customer display 15 by a specific communication protocol.
  • the wired device communication unit 24 includes a network interface card connected to a physical port.
  • the wired device communication unit 24 communicates data and signals with the card reader 13 and customer display 15 as controlled by the device communication control unit 20 c of the printer-side control unit 20 .
  • the printer interface 23 connects to the communication line 5 ( FIG. 1 ), and exchanges data with the tablet device 10 as controlled by the printer-side control unit 20 .
  • the tablet device 10 includes a tablet control unit 26 , tablet interface 27 , display control unit 28 , I/O unit 29 , and touch panel 10 a.
  • the touch panel 10 a includes a display panel 10 b on the front side of the tablet device 10 as shown in FIG. 3 , and a touch sensor 10 c disposed in unison with the display panel 10 b .
  • the display panel 10 b is a flat panel display such as an LCD panel, OLED panel, ore-paper, and is driven by the display control unit 28 .
  • the touch sensor 10 c is on the surface of the tablet device 10 .
  • the surface of the touch sensor 10 c may be covered with glass or a plastic sheet.
  • the touch sensor 10 c may be a capacitive or resistive sensor, detects touches by the user's finger or a stylus, and outputs a signal indicating the position where the operation was detected to an I/O unit 29 .
  • the display control unit 28 drives the display panel 10 b based on display data input from the browser execution unit 26 a , and displays an image including text or graphic on the display panel 10 b.
  • the I/O unit 29 detects touch operations on the touch panel 10 a based on signals output by the touch sensor 10 c . When a touch operation is detected, the I/O unit 29 generates coordinate data identifying the coordinates of the position on the display panel 10 b that was touched, and outputs to the browser execution unit 26 a.
  • the tablet control unit 26 controls various parts of the tablet device 10 , and includes a CPU, RAM, ROM, and other peripheral circuits not shown.
  • the tablet control unit 26 includes a browser execution unit 26 a that renders functions of a common web browser by running a browser program.
  • the browser execution unit 26 a functions as a web browser by executing a browser program.
  • the browser execution unit 26 a downloads a web page written in a scripting language or markup language such as HTML from the POS server 17 .
  • Data for the downloaded web page is stored, for example, in RAM not shown.
  • the browser execution unit 26 a reads the data for the downloaded web page, and generates and outputs display data for displaying the web page to the display control unit 28 .
  • the browser execution unit 26 a executes processes independently or in conjunction with the application execution unit 30 a of the POS server 17 by means of a function of a script embedded in the web page.
  • the browser execution unit 26 a determines the input content based on the coordinate data input from the I/O unit 29 according to the touch operation, and the display data output to the display control unit 28 . Based on the identified input content, the browser execution unit 26 a appropriately executes a process by a function of the script, and sends data indicating the identified input content to the POS server 17 .
  • the application execution unit 30 a executes processes based on the input data.
  • the browser execution unit 26 a receives data indicating the result of the application execution unit 30 a executing the web application program from the POS server 17 , and generates and outputs display data reflecting the received data to the display control unit 28 .
  • the tablet interface 27 communicates with the printer 11 and POS server 17 according to a specific communication protocol as controlled by the tablet control unit 26 .
  • the tablet device 10 could communicate with the printer 11 and POS server 17 through a wired connection, but communicating through a wireless connection is preferable in order to effectively utilize the mobility of the tablet device 10 .
  • the POS server 17 has a database storing product information, a database for managing sales, and a database for managing product inventory, and uses these databases to manage the control system 1 .
  • the POS server 17 includes a server-side control unit 30 , server-side storage unit 31 , and server interface 32 .
  • the server-side control unit 30 controls various parts of the POS server 17 , and includes a CPU, RAM, ROM, and other peripheral circuits.
  • the server-side storage unit 31 is a hard disk, EEPROM, or other nonvolatile memory device, and stores data rewritably.
  • the server interface 32 communicates with the tablet device 10 according to a specific communication protocol as controlled by the server-side control unit 30 .
  • a web application 35 is stored so that it can be loaded from the server-side storage unit 31 .
  • the application execution unit 30 a of the server-side control unit 30 is a function block that executes the web application 35 .
  • the web application 35 is a program that executes processes required for the control system 1 to operate as a POS system.
  • the application execution unit 30 a generates or reads from the server-side storage unit 31 data for the web page requested by the tablet device 10 , and sends the data to the tablet device 10 .
  • the application execution unit 30 a receives the data through the server interface 32 .
  • the application execution unit 30 a executes the transaction process based on the data from the tablet device 10 by running the web application 35 , and sends the result of the transaction process to the tablet device 10 .
  • the tablet device 10 executes the following process before the transaction process is performed.
  • the cash register operator or other person first starts the browser of the tablet device 10 and displays a dedicated user interface UI on the touch panel 10 a .
  • the browser execution unit 26 a of the tablet control unit 26 then accesses a specific address on the POS server 17 , acquires an HTML file or other screen drawing file, and displays the dedicated user interface UI based on the acquired file.
  • a program with a function for executing a transaction process in conjunction with the application execution unit 30 a of the POS server 17 is embedded in this screen drawing file using a specific scripting language.
  • FIG. 3 shows an example of the dedicated user interface UI displayed on the touch panel 10 a.
  • a display list area 39 for displaying the name, price, and quantity of the products purchased by the customer is presented in the top left part of the dedicated user interface UI shown in FIG. 3 .
  • Amount fields 40 for displaying and inputting the total of the products purchased by the customer, the amount of money received from the customer for the transaction, and the amount of change due to the customer, is presented on the right beside the display list area 39 .
  • barcode information the information represented by the barcode that is read with the barcode scanner 12 (“barcode information”) is input and displayed.
  • the barcode information is basically identification information assigned to each product type.
  • a customer number field 42 where the customer number acquired by reading a frequent customer card, for example, with the card reader 13 is input and displayed.
  • a virtual keypad 43 is displayed on the right beside the barcode data field 41 and customer number field 42 . Information can be entered using this virtual keypad 43 to the various fields displayed in the dedicated user interface UI, and the virtual keypad 43 has all keys required for data entry.
  • An address field 44 where the accessed address is displayed is presented at the top of the dedicated user interface UI.
  • FIG. 4 The basic operation performed when the devices of the control system 1 described above process a transaction is described next with reference to the flow chart in FIG. 4 using a transaction in which a customer purchases a single product as an example.
  • the left column A shows the operation of the printer 11
  • the middle column B shows the operation of the tablet device 10
  • the right column C shows the operation of the POS server 17 .
  • step SX 1 the operator first scans the barcode of the one product using the barcode scanner 12 (step SX 1 ).
  • the device communication control unit 20 c of the printer-side control unit 20 thus acquires the data captured by the barcode scanner 12 through the wireless device communication unit 22 (step SA 1 ).
  • the device communication control unit 20 c then generates data representing the barcode information based on the acquired barcode data, and outputs the data representing the barcode information to the communication unit 20 b (step SA 2 ).
  • the communication unit 20 b sends the data representing the barcode information to the browser execution unit 26 a of the tablet device 10 (step SA 3 ).
  • the browser execution unit 26 a of the tablet control unit 26 of the tablet device 10 displays the barcode information in the barcode data field 41 using a function of a program (“dedicated script”) embedded in the HTML file for the dedicated user interface UI (step SB 1 ).
  • the browser execution unit 26 a uses a function of the dedicated script to communicate with the application execution unit 30 a of the POS server 17 and requests the name and price of the product identified by the barcode information (step SB 2 ).
  • the application execution unit 30 a accesses the appropriate database based on the query to retrieve the required information, and outputs the acquired information to the browser execution unit 26 a of the tablet device 10 (step SC 1 ).
  • the browser execution unit 26 a of the tablet device 10 displays the name, price, and quantity of the product selected by the customer in the display list area 39 , and displays the total of the products selected by the customer in the appropriate amount field 40 (step SB 3 ).
  • the browser execution unit 26 a communicates appropriately with the application execution unit 30 a through a function of the dedicated script, and displays the appropriate information in the corresponding amount fields 40 (step SB 4 ).
  • the browser execution unit 26 a generates an XML document (print data) containing information related to the receipt to be produced by the print unit 21 (step SB 5 ).
  • This XML document contains the information required to produce the receipt, including text and graphic information to be printed on the receipt, in a specific format.
  • the browser execution unit 26 a then sends the generated XML document using a method described below to the communication unit 20 b of the printer 11 according to a specific protocol (step SB 6 ).
  • the communication unit 20 b of the printer 11 receives the XML document (step SA 4 ) using the method described below, and outputs to the print unit control unit 20 a (step SA 5 ).
  • the print unit control unit 20 a Based on the input XML document, the print unit control unit 20 a generates and outputs to the print unit 21 a control command using the command language of the print unit 21 that causes the print unit 21 to execute the processes required to produce a receipt (step SA 6 ).
  • the control circuit of the print unit 21 controls the relevant mechanisms based on the control command and produces a receipt (step SA 7 ).
  • the tablet device 10 To produce a receipt in this embodiment of the disclosure, the tablet device 10 generates and sends an XML document containing the information for the receipt to the printer 11 (steps SB 5 , SB 6 in FIG. 4 ), and the printer 11 then produces (prints) the receipt based on the received XML document (steps SA 4 to SA 7 in FIG. 4 ).
  • encryption may or may not be required for communication. More specifically, when communicating or printing information related to the customer's credit card or other personal information that should not be leaked to third parties, the XML document must be specifically encrypted to prevent data theft (leaking) during communication. However, if confidential information that should not leak out is not printed on the receipt, there is no need to encrypt the XML document for communication, efficiency is improved by not using encryption, and the total processing time can be shortened.
  • the tablet device 10 and printer 11 communicate using a method appropriate to the data being communicated as described below.
  • FIG. 5 is a block diagram showing the main functional configuration of the tablet device 10 and printer 11 .
  • the tablet device 10 and printer 11 open two logical channels for communicating data between the devices, a first logical communication channel K 1 (first communication channel) and a second logical communication channel K 2 (second communication channel).
  • the first logical communication channel K 1 and second logical communication channel K 2 are further described below.
  • the first logical communication channel K 1 is a logical communication channel for carrying encrypted data when the XML document or other data is encrypted for communication.
  • the browser execution unit 26 a and communication unit 20 b open the first logical communication channel K 1 as described below.
  • the browser execution unit 26 a and communication unit 20 b open a connection using the WebSocket protocol between the host-side first data processor 50 and device-side first data processor 51 .
  • the host-side first data processor 50 and device-side first data processor 51 are function blocks for a virtual interface used for data communication based on the WebSocket protocol. While the first logical communication channel K 1 is a communication channel based on the WebSocket protocol in this embodiment, the Comet Protocol or other standard could be used instead.
  • the browser execution unit 26 a and communication unit 20 b then communicate over the opened connection, and generate and acquire a shared key used to encrypt and decrypt data carried on the first logical communication channel K 1 .
  • the shared key can be generated using the Diffie-Hellman key exchange or other method.
  • the browser execution unit 26 a then stores the shared key to a specific variable, for example, defined in the program rendering the host-side first data processor 50 function, and renders the data encryption/decryption function using the shared key in the host-side first data processor 50 .
  • This process is a process of storing print data sent by the control device and received by the printing device in encrypted form.
  • the communication unit 20 b likewise renders a data encryption/decryption function using a shared key in the device-side first data processor 51 .
  • a first logical communication channel K 1 is thus established between the host-side first data processor 50 and device-side first data processor 51 , the XML document generated by the browser execution unit 26 a is then encrypted by the host-side first data processor 50 using the shared key and output to the device-side first data processor 51 over the first logical communication channel K 1 , and is then decrypted by the device-side first data processor 51 using the shared key.
  • Data flowing over the first logical communication channel K 1 is thus data that is encrypted using a shared key.
  • the second logical communication channel K 2 is a logical channel carrying unencrypted data when the XML document or other data is not encrypted.
  • the browser execution unit 26 a and communication unit 20 b open the second logical communication channel K 2 , which is a communication channel based on the HTTP protocol, for example, between the host-side second data processor 53 and device-side second data processor 54 .
  • the host-side second data processor 53 sends the XML document through the second logical communication channel K 2 to the device-side second data processor 54 using the HTTP protocol, for example.
  • This embodiment thus opens two channels between the tablet device 10 and printer 11 , a first logical communication channel K 1 that carries encrypted data, and a second logical communication channel K 2 that carries unencrypted data.
  • This embodiment can therefore transmit data using the method appropriate to the type of data, and the method of communicating data can be varied according to the type of data, by changing the channel through which the data is communicated according to the type of data, such as whether the data to be communicated contains personal information.
  • FIG. 6 is a flow chart showing in further detail the process from when the tablet device 10 generates the XML document until the printer 11 produces a receipt based on the XML document (that is, steps SB 5 and SB 6 , and steps SA 4 to SA 7 , in FIG. 4 ).
  • column A shows the operation of the tablet device 10
  • column B shows the operation of the printer 11 .
  • the browser execution unit 26 a of the tablet device 10 uses a function of the dedicated script to generate an XML document containing the information required to produce a receipt in a specific format (step SD 1 ).
  • the browser execution unit 26 a determines whether to send the generated XML document over the first logical communication channel K 1 or the second logical communication channel K 2 (step SD 2 ).
  • the decision of step SD 2 is made as described below.
  • the user can set whether to send data over the first logical communication channel K 1 or the second logical communication channel K 2 , and the browser execution unit 26 a decides based on the user setting whether to use the first logical communication channel K 1 or second logical communication channel K 2 . In this instance the user can appropriately determine whether or not to use encrypted communication based on knowledge of the information to be exchanged between the tablet device 10 and printer 11 .
  • the browser execution unit 26 a could analyze the content of the XML document by referencing the value of a certain flag in the XML document, for example, to determine if information that should be protected from leaking is contained in the XML file and select the first logical communication channel K 1 or second logical communication channel K 2 accordingly.
  • This implementation improves user convenience because there is no need for a setting made by the user, effectively suppresses encrypting data that does not require encryption, and can improve process efficiency.
  • the browser execution unit 26 a then sends the XML document to the communication unit 20 b of the printer 11 using the channel selected in step SD 2 (step SD 3 ).
  • the XML document is encrypted using the shared key by the host-side first data processor 50 , output over the first logical communication channel K 1 to the device-side first data processor 51 , and then decrypted using the shared key by the device-side first data processor 51 .
  • the second logical communication channel K 2 is used, the XML document is sent from the browser execution unit 26 a to the communication unit 20 b over the second logical communication channel K 2 using the HTTP protocol without encryption.
  • the data communication unit 55 of the communication unit 20 b of the printer 11 then receives the transmitted XML file through the device-side first data processor 51 or device-side second data processor 54 (step SE 1 ), processes the data as needed, and outputs to the print unit control unit 20 a (step SE 2 ).
  • the print unit control unit 20 a Based on the input XML document, the print unit control unit 20 a generates a control command in the command language of the print unit 21 (step SE 3 ).
  • the control command generated here is a command group that reflects print settings such as the print speed, print density, and margins, and causes the print unit 21 to execute the processes related to producing a receipt.
  • the function of generating control commands based on the XML document is rendered by a dedicated program (script) containing an algorithm with the appropriate function.
  • the print unit control unit 20 a then outputs the generated control command to the print unit 21 (step SE 4 ).
  • the control circuit of the print unit 21 controls the appropriate mechanisms based on the control command and produces a receipt (step SE 5 ).
  • the tablet device 10 in this embodiment of the disclosure changes the communication channel according to the type of data when sending an XML document to produce a receipt, and the communication unit 20 b receives the XML document over either the first logical communication channel K 1 or second logical communication channel K 2 and processes the received XML document according to the communication channel that was used.
  • Data can therefore be sent and received appropriately according to the type of data using two channels, a first logical communication channel K 1 and a second logical communication channel K 2 .
  • the control system 1 includes a tablet device 10 that generates and sends data using a browser function, and a printer 11 that can connect to the tablet device 10 .
  • the tablet device 10 transmits data using one of a plurality of channels that carry different types of data; the communication unit 20 b of the printer 11 receives the data through the selected channel and processes the data according to the selected communication channel; and the print unit control unit 20 a functioning as a print unit records based on the data received by the communication unit 20 b.
  • the tablet device 10 in this embodiment transmits over a first communication channel or a second communication channel according to the type of data, and the printer 11 receives the print data and prints after processing the print data appropriately to the communication channel that was used.
  • the printer 11 can execute a process and print appropriately according to the type of print data.
  • This embodiment also enables data communication between the tablet device 10 and printer 11 using one of a plurality of communication channels according to the type of data, and can diversify the method used for data communication between devices.
  • the tablet device 10 in this embodiment sends encrypted data (XML document) through the first logical communication channel K 1 to the printer 11 , the communication unit 20 b of the printer 11 decrypts the data received through the first logical communication channel K 1 , and the print unit control unit 20 a records based on the data decrypted by the communication unit 20 b.
  • encrypted data XML document
  • Data requiring encryption can thus be received through the first logical communication channel K 1 , data not requiring encryption can be sent and received through a different channel, and the devices can easily switch between encrypting and not encrypting data for communication.
  • the browser execution unit 26 a of the tablet device 10 and the communication unit 20 b of the printer 11 in this embodiment determine the encryption applied to data to be communicated over the first logical communication channel K 1 according to a specific rule.
  • the browser execution unit 26 a of the tablet device 10 then sends the data (XML document) encrypted according to the determined encryption method over the first logical communication channel K 1 to the printer 11 , and the communication unit 20 b of the printer 11 decrypts the data received through the first logical communication channel K 1 using the determined encryption method.
  • Data communicated over the first logical communication channel K 1 can thus be reliably encrypted using a method enabling decryption on the printer 11 side.
  • the encryption method in this embodiment generates a shared key, but generating the shared key is not limited to using a digital certificate issued by an external authority. This implementation does not incur a licensing fee for a digital certificate to build and operate the control system 1 , and is therefore cost effective.
  • the tablet device 10 in this embodiment sends an encrypted markup document (XML document) for printing to the printer 11 through the first logical communication channel K 1 .
  • the communication unit 20 b of the printer 11 decrypts the XML document received through the first logical communication channel K 1 , and outputs the decrypted XML document to the print unit control unit 20 a .
  • the print unit control unit 20 a then converts the XML document to control commands for the print unit 21 , outputs the control commands to the print unit 21 , and the print unit 21 produces a receipt.
  • this embodiment When sending a markup document for printing from the tablet device 10 to the printer 11 , this embodiment enables appropriately encrypting and then transmitting the markup document as needed using the simple means of changing the transmission channel to the first logical communication channel K 1 .
  • FIG. 7 is a block diagram showing the functional configuration of the communication unit 60 (a function block corresponding to the communication unit 20 b in the first embodiment) in a printer 11 according to this embodiment of the disclosure.
  • the communication unit 60 has a communication control unit 61 , a first data processing unit 62 (first channel), and a second data processing unit 63 (second channel).
  • the first data processing unit 62 is a processing unit with at least a function of executing a process related to receiving encrypted data after decrypting the data by the same specific encryption method used to encrypt the data.
  • the second data processing unit 63 is a processing unit with at least a function of executing a process for receiving data that is not encrypted.
  • Print data received from a host computer such as a tablet device 10 according to the first embodiment of the disclosure is input to the communication control unit 61 of the communication unit 60 .
  • the communication control unit 61 determines if the input print data is encrypted data or unencrypted data. For example, a flag identifying whether or not the data is encrypted could be stored in a specific part of the print data, and the communication control unit 61 determine if the data is encrypted based on this flag.
  • the communication control unit 61 outputs the print data to the data communication unit 55 through the first data processing unit 62 (first channel), but outputs the print data through the second data processing unit 63 (second channel) to the data communication unit 55 if the print data is not encrypted.
  • the data communication unit 55 processes the input data as required before outputting to the print unit control unit 20 a.
  • the printer 11 can print based on the print data after executing a process dependent on the type of print data by the simple means of communicating the print data through a first data processing unit 62 as a first channel or a second data processing unit 63 as a second channel according to the type of print data. More specifically, the printer 11 can execute an appropriate process according to the type of print data by a simple means.
  • the data process executed by the first data processing unit 62 as a first channel in this embodiment is a decryption process that decrypts encrypted print data, and when the received print data is encrypted data, the communication unit 60 passes the encrypted data through the first data processing unit 62 and decrypts the encrypted data.
  • This embodiment of the disclosure can thus print based on print data that requires decrypting by first appropriately decrypting the encrypted print data by passing it through the first data processing unit 62 .
  • the disclosure is described above using as examples of plural channels a first logical communication channel K 1 that carries encrypted data and a second logical communication channel K 2 that carries unencrypted data.
  • processes such as described below can also be executed by applying the technical concept of the disclosure, that is, opening a plurality of communication channels for communicating different types of data between a printer and a control device that generates and sends data using a function of a browser. This enables achieving the effect of diversifying the methods of data communication according to the type of data, and communicating data by methods appropriate to the type of data.
  • Plural communication channels for communicating data compressed with different compression rates for communication are opened between the browser execution unit 26 a and communication unit 20 b .
  • the appropriate communication channel is then appropriately selected and data is communicated based on the communication speed, current communication traffic, CPU power, and the load on the CPU.
  • the data transmitted in a compressed form is then decompressed by the printer. This configuration enables applying data compression with the desirable compression rate and communicating data according to the actual system environment and operating conditions.
  • Plural communication channels for communicating data related to device control to a plurality of devices connected to the printer 11 are opened between the browser execution unit 26 a and communication unit 20 b .
  • the browser execution unit 26 a then changes the communication channel and transmits data depending on the device to be controlled. By thus changing the communication channel according to the device, control data can be output to the appropriate device.
  • control system 1 is described using a POS system as an example in the foregoing embodiments, but the disclosure is not limited to a POS system.
  • the function blocks shown in FIG. 2 can be achieved by the cooperation of hardware and software, and do not suggest a specific hardware configuration.
  • Operations including the operations described in the flow charts shown in FIG. 4 and FIG. 6 can also be achieved by the devices running an appropriate program stored on an external storage medium.
  • a printing device includes a communication unit that has a first channel that executes a data process and a second channel different from the first channel, and communicates print data on the first channel or the second channel; and a print unit that prints based on the print data communicated on the first channel or the second channel of the communication unit.
  • the printing device in this aspect of the disclosure can print based on the print data after executing a process appropriate to the type of print data. More specifically, the printing device can execute an appropriate process by a simple means according to the type of print data.
  • the data process executed on the first channel is a decryption process that decrypts the encrypted print data; and the communication unit communicates the print data on the first channel when the received print data is encrypted and decrypts the encrypted data.
  • this aspect of the disclosure enables appropriately decrypting the print data and then printing based on the decrypted print data.
  • control system including: a control device having a browser execution unit that runs a web browser, and transmitting print data output by the browser execution unit on a first communication channel or a second communication channel; and a printing device having a communication unit that receives the print data transmitted by the control device on the first communication channel or second communication channel, and executes a process appropriate to the first communication channel or second communication channel, and a print unit that prints based on the print data received by the communication unit.
  • the control device in this aspect of the disclosure transmits over the first communication channel or second communication channel according to the type of data, and the printing device receives the print data and then prints after processing the received data appropriately to the communication channel.
  • the control device and printing device communicate over the first or second communication channel appropriately to the type of print data, the printing device can execute a process corresponding to the type of print data and print appropriately.
  • control device encrypts the print data and transmits the encrypted print data on the first communication channel; and the printing device decrypts the print data transmitted on the first communication channel.
  • this aspect of the disclosure enables the control device and printing device to easily switch between encrypting data and not encrypting data for communication.
  • control device and the printing device store encryption information related to encrypting the print data; the control device encrypts the print data based on the stored encryption information and transmits the encrypted print data on the first communication channel; and the printing device decrypts the print data transmitted on the first communication channel based on the stored encryption information.
  • This aspect of the disclosure enables appropriate encryption and decryption of data passing through the first communication channel by the control device and printing device.
  • the print unit of the printing device converts the decrypted print data to a control command that controls the print unit, and prints based on the converted control command.
  • This aspect of the disclosure enables printing appropriately.
  • Another aspect of the disclosure is a control method of a control system, the control method including steps of: a control device transmitting print data to a printing device on a first communication channel that performs a data process on the print data or a second communication channel that performs a data process different from the data process performed on the first communication channel; and the printing device printing based on the print data transmitted on the first communication channel or the second communication channel.
  • the control method By communicating print data through a first channel or second channel depending on the type of print data, the control method according to this aspect of the disclosure enables the printing device to print based on the print data after executing a process appropriate to the type of print data. More specifically, the printing device can execute an appropriate process by a simple means according to the type of print data.
  • Another aspect of the disclosure is a program that causes a printing device to receive print data over a first communication channel that processes the received print data or a second communication channel different from the first communication channel, and to print based on the print data received over the first communication channel or the second communication channel.
  • the program according to this aspect of the disclosure enables the printing device to process the received data appropriately to the type of print data and then print based on the print data. More specifically, the printing device can easily execute a process appropriate to the type of print data.
  • Another aspect of the disclosure is a method of controlling a control system having a printing device and a control device that can communicate with the printing device, wherein the control device transmits print data output by a browser execution unit that runs a web browser through a first communication channel or a second communication channel, and the printing device receives the print data sent by the control device through the first communication channel or second communication channel, processes the data as required according to the communication channel that was used, and prints based on the received print data.
  • the printing device in this aspect of the disclosure can print based on the print data after executing a process appropriate to the type of print data. More specifically, the printing device can execute an appropriate process by a simple means based on the type of print data.

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